CVE-2021-38669: Microsoft Edge (Chromium-based) Tampering Vulnerability

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-09-15 · updated 2026-08-10

Description

Microsoft Edge (Chromium-based) Tampering Vulnerability

Affected products

Microsoft Edge: before 93.0.961.44 — fixed in 93.0.961.44
Microsoft Edge (Chromium): before 93.04577.63 — fixed in 93.04577.63
Microsoft Edge (Chromium): from 1.0.0.0 before 93.0.961.44 — fixed in 93.0.961.44

How to fix

Upgrade to a fixed version: Microsoft Edge 93.0.961.44; Microsoft Edge (Chromium) 93.04577.63; Microsoft Edge (Chromium) 93.0.961.44. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38669
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38669

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